Sewage Treatment Plant objective questions and answers

6. The drop man holes are generallyprovided in sewers for

   A.Industrial areas

   B.Large townships

   C.Hilly townships

   D.Cities in plains

7. The porosity of sediments in sewer pipes, is usually taken as

   A.0.010

   B.0.011

   C.0.012

   D.0.013

8. With self-cleansing velocity in sewers

   A.Silthing occurs at bottom

   B.Scouring occurs at bottom

   C.Both silting nor scouring occurs at bottom

   D.Neither silting nor scouring occurs at bottom

9. For sewers, inverted siphon is provided for

   A.One pipe

   B.Two pipes

   C.Three pipe

   D.Four pipe

10. In sewer the highest non-scouring velocity is achieved in

   A.Glazed bricks sewer

   B.Cast iron sewers

   C.Cement concrete sewers

   D.Stone ware sewers

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